Peters



. 2Sheets-Sheet 1 G. MGKAY & J. U. HOADLEY.

(No Model.)

SOLE SEWING MACHINE.

Patented Peb.20,1883.

Nw PETERS. Pholo-Lilhc nphv. wummm n. c,

(No Model.) 2 Sheets-Sheet 2.

G. MoKAY & J. G. HOADLEY.

SOLE SEWING MACHINE.

No. 272,735.- Patented Feb.20,1883.

A mnlgqllallll n. PETERS Phom-umomp ur. Wnhinsmn D. a

NITED STATES GORDON M'oKAY, OF NEWPORT, R. I., AND JOHN G. HOADLEY, OF BOSTON, MASS; SAID HOADLEY ASSIGNOR TO SAID MGKAY.

SOLE-SEWING MACHINE.

SPECIFICATION forming part of Letters Patent No. 272,735, dated February 20, 1883.-

Application filed November 23, 1882.

To all whom it may concern:

Be it known that we, GORDON McKAY, of Newport, county of Newport, and State of Rhode Island, and JOHN G. HOADLEY, of Boston, Massachusetts, have-invented an Improvement in Sole-Sewing Machines, of which the following description, in connection with the accompanying drawings, is a specification.

Our invention has for its object to increase the speed of sole-sewing machines beyond that at which they are now run, and thus enable them to perform more work, and this we have been enabled to accomplish withoutdetriment to the sewing.

1 In this. our invention, to insure uniformity of stitch and avoid jerking the thread and turning a spool, which causes great variation in tension, we have shown the thr ad-holder as a stationary bobbin arranged to deliver its thread from its end. To enable the speed of the needle-bar to be increased to the highest practical liniitof speed at which it can be run and an operator take proper care of the work, we had to decrease the weight of the needlebar and its operative parts, and reduce the strain on the said parts which arises from momentum, and this we have provided for by making the needle-bar hollow and reducing the weight of parts, as will be hereinafter de-,

0 scribed. Having arranged to run the needlebar-actuating mechanism at its increased and greatest practical speed, we arranged mechanism to operate the whirl at a relative speed twice faster than that of the needle-bar.

whirl, rotated continuously withoutjar, is always in time to operate in unison with and supply the hooked needle with thread while it is below the material and the supporting-surface of the horn, and while the needle is tem- 0 porarily at rest at the end of its downstroke.

Our invention consistsin an organized solesewing machine containing a hollow needlebar, a hooked needle, means to operate the needle-bar and cause it to dwell at its downstroke, a horn, a thread-carrying whirl therein, and means to rotate it twice to each complete rise and fall of the needle-bar, a stationary bobbin or cop to deliver the thread from its end, and a tension device to act upon the said thread between the bobbin or cop and The (No model.)

whirl, and maintain it at uniform tension irrespective of decreasing size of the bobbin, also in details of mechanism, as will be hereinafter described.

Figure 1 represents in front elevation and partial section a sufficient portion of a solesewing machine to illustrate our invention; Fig. 2, a side elevation with the frame-work partially broken away; Fig. 3, a detail of the end of the horn and whirl; Fig. 4, an enlarged 6o sectional detail of the hollow needle-bar, needle, and cast-off, and walking-beam, and connected link; Fig. 5, a sectional detail of the eccentric and link to move the walking-beam; Fig. 6, a cross-section of the walking-beam in 6 the line a: m, Fig. 2; Fig. 7, a partial top view and section of the .tension device; Fig. 8, a side view of the tension-wheel, and Fig. 9 a side View of the needle-bar link.

The frame-work A, of usual shape, has a. main shaft, a, provided with a hollow eccentric, a which receives the strap of an eccentric-link, a, which is connected to the rear end ot' a walking-beam or i'ieedle-bar-actuating lever, a having its fulcrum on the rising and falling rod a, substantially as in United States Patent No. 45,422. The walking-beam is made T-shaped in cross-section, as in Fig. 6, to secure greatest strength in proportion to the weight of metal. The forward end of lever a is pro- 8 vided with askeleton link, 1), (shown separately in Fig. 9,) attached at its lower end by a screw or pin, 1), (see Fig. 4,) to a collar, b secured to the hollow needle-bar b by the same screw. v The upper end ofthe skeleton link is connected 8 with the forked end of the walking-beam 0. by a tubular or hollow steel pin,19,pret'erably con= fined to the said beam bya screw, 3, and a cross-pin, 4, the hollow pin having at one end a head, 5, as in Fig. 4. The link a is cou- 9o nected with the rear end of the needle-bar by a like hollow pin, 1). Heretofore the links referred to have been joined with the walkingbeam by solid pins. The hollow pin and link act to very considerably reduce the strain aris- 9 ing from momentum. The needle-bar b has its lower guidein the pillar-plateb and its upper guide in the top plate, b the said top plate having attached to it an adjustable friction device, 0, such as described in United States Patent No. 45,422, to act upon and retard the needle-bar at the end of its up and down strokes, as is well understood.

The cast-oft c and its operative mechanism are and may be the same as in the patent referred to.

The needle-bar and hooked needle 0 attached to it, have a short period of rest or dwell at the end of each descent, just at the time that the whirl 0 (see Fig. 8) in its rotation acts to deliver its thread (taken from bobbin 8) to the hook of the needle, the whirl,to do this effectually, having nearly a complete revolution while the hook of the needle is below the stock and the surface or top of the work-supporting born 0 which latter is constructed, as usual, to be rotated.

The needle-bar I) (see Fig. 4) is hollow and made of steel, so that it is very light, but yet very strong,and, beingoflight weight,itis possible to start it quickly, move it rapidly, and stop it suddenly without liability of breaking the needle-bar and its moving parts, owing to great strain and momentum, as would be the case were the needle-bar made as a solid piece of metal and of the diameter usually employed in sole-sewing machines as made prior to the one herein shown and described.

The main shaft a has upon it a gear, (I, which engages a gear, at, having but halt as many tet-th, on a short shaft, (1 provided with a bevel-gear, Wlll(l1 in turn engages a bevelgear, (1*. on shaft (1 and, through the said shaft, gears (Z 61 and shaft (1 drives gears 61 61 The bevel-gearwhich engages the bevel-gear d and the gears d d and (1 (1 are made in pairs, the teeth in each of the gears of each pair being equal in number. The gear 0 at the top of the shaft 0 engages with a smaller gear, 0 on the shaft 6 The pair of gears c and e are in the ratio of fourteen to six, which is the ratio existing between the number of teeth in the whiil and gear 6 which drives it, but in the converse direction, to thus reduce the speed of the whirl relatively to the gear 0 which drives it, in the same proportion that the said gear was accelerated by the difierence between the number of teeth of gears cand 0 By thus changing the size of the gear referred to .it is possible to make the gear 0 smaller than were the gears c and e of like size, and as it is very necessary to economize space in the end of the born the change of size in gearing becomes important, and yet the change does not affect the relative motion of the whirl and main shaft, but enables the whirl to perform exactly two revolutions to one of the said main shaft. The shaft 0 has a bevel-gear, c, which engages a bevelgear, c of like diameter on the shaft 0 which at its upper end has the bevel-gear 0 with six teeth, which engages the whirl having fourteen teeth. The whirl 0 (see Fig. 3) is rotated continuously forward at a uniform speed derived from and depending upon the main shaft a and at a speed relatively twice as fast as the speed of the shaft which actuates the needle-bar and needle, so that the whirl rotates twice during each complete rise and fall of the needle-bar, one of the said rotations being injust the proper time to lay the thread carried by the whirl into the hook of and about the needle, so-that the said thread is taken unerringly. Two to one is the leastpossible variationin speed between the needle and whirl which it is practicable to have and enable the whirl to be rotated continuously at a uniform speed while the needle is reciprocated at its highest practical speed. The waxed thread to be presented to the hooked needle by the whirl at each second rotation of the latter, or while the needle-bar is at rest at its downstroke, will be taken front a bobbin or cop, 8, such as commonly usedin' loom-sh uttles, and the thread being taken from the end of the said bobbin or cop while at rest, enables the thread to reel off without the necessity of rotating the said bobbin or cop. The thread referred to will be led from the bobbin 8 aboutthe rotating whirl g of a threadtension device controlled by a spring, g, nut g and lever 9 The tension device and bobbin referred to are substantially such as represented in United States Patent No. 229,049, to which reference may be had.

We do not herein claim as novel and of our' joint invention any one of the especial devices herein shown and described; but the novel combination and arrangement of the various parts and their reduction in weight, as described, enable us to so materially increase the practical speed of the machine that a much larger quantity of work may be done upon it in a given time and without breakage of parts or injuriously affecting the uniform good quality of the work. The sewing done by this our rapidly-operating machine is equal in all particulars to that done on sole-sewing machines prior to this onrinvention, but operating at a speed very considerably slower than the one herein described.

While we consider. a whirl having two rota tions to each complete up and down movement of the needle-bar as producing the most satisfactory results, it is obvious that the whirl might have more than two rotations in the time specified without departing from our invention but such increase ot'the speed of the whirl is not desirable, and would necessitate a slower movement of the needle-bar.

We claim- 1. The combination, in a sole-sewingmachine, of a hollow needle-bar, hooked needle, means to operate the needle bar and cause the needle to dwell or rest at the end of the downstroke, the horn, the whirl, and means to to tate the same twice at each complete rise and fall of the needle-bar, a stationary bobbin or cop to hold the thread and obviate inequalities of delivery, owing to variations in the diameter of the bobbin, and a tension device to act upon the said thread-between the bobbin and whirl, all substantially as and for the pur- In testimony whereof we have signed our pose set forth. names to this specification in the presence of [0 2. The walking-beam orlever,liollowneedle-v two subscribing witnesses. bar and connecting-link, and hollow pin,(:om- GORDON MGKAY. 5 bined with the horn, its whirl, and means to JOHA O. HOADLEY.

move the same continuously in one direction Witnesses: twice during each complete stroke of the nee- G. W. GREGORY, die-bar, substantially as described. J 08. P. LIVERMORE. 

